YANG, H.M. Population Dynamics and the Epidemiological Model Proposed by Severo. Trends in Computational and Applied Mathematics, [S. l.], v. 3, n. 2, p. 227–236, 2002. DOI: 10.5540/tema.2002.03.02.0227. Disponível em: https://tema.sbmac.org.br/tema/article/view/418. Acesso em: 3 jul. 2024.